<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      /* body {
        place-content: center;
        display: flex;
      } */
      div {
        background-color: pink;
        width: 500px;
        height: 500px;
        margin-left: 100px;
        position: relative;
      }
      span {
        position: absolute;
        width: 100px;
        height: 100px;
        bottom: 0;
        background-color: skyblue;
      }
    </style>
  </head>
  <body>
    <div>
      <span>123213</span>
    </div>
  </body>
</html>
